CN108547592B - One-way valve and electric pump oil production pipe column - Google Patents
One-way valve and electric pump oil production pipe column Download PDFInfo
- Publication number
- CN108547592B CN108547592B CN201810163262.8A CN201810163262A CN108547592B CN 108547592 B CN108547592 B CN 108547592B CN 201810163262 A CN201810163262 A CN 201810163262A CN 108547592 B CN108547592 B CN 108547592B
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- pipe
- valve
- straight pipe
- straight
- check valve
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 239000004576 sand Substances 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 29
- 238000007789 sealing Methods 0.000 claims description 6
- 239000010779 crude oil Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 3
- 230000007704 transition Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Check Valves (AREA)
Abstract
The application provides a check valve and charge pump oil production pipe, the check valve includes: the straight pipe is provided with a one-way flow limiting mechanism which can be conducted from top to bottom and is used for limiting the flow of fluid below the straight pipe to flow upwards; the upper end of the bypass pipe is connected with the side wall of the straight pipe, the bypass pipe is communicated with the straight pipe, and the one-way flow limiting mechanism is positioned below the upper end of the bypass pipe; the axial direction of the bypass pipe is not completely coincided with the axial direction of the straight pipe. The one-way valve provided by the embodiment of the invention has the function of self-discharging sand while having the function of conventional one-way flow limiting, and avoids sand blockage.
Description
Technical Field
The application relates to the technical field of electric pump oil production equipment, in particular to a one-way valve and an electric pump oil production pipe column.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
The electric pump oil production pipe column suitable for the high-yield oil well at least comprises an oil pipe, a one-way valve and a pump which are sequentially connected with the oil pipe, wherein the lower end of the pump is connected with a motor, and the motor is connected with ground power equipment through a cable, so that the pump can be driven to operate, and oil extraction is realized.
The electric pump oil production pipe is put into a casing pipe, a sand control screen pipe is arranged on the casing pipe, coarse sand with larger granularity can be blocked outside the production pipe, and fine sand and silt with smaller granularity still enter the production pipe through the sand control screen pipe. Therefore, when the pump is stopped due to the requirement of management operation, a large amount of sand entering the production string can be deposited, so that the check valve is buried and blocked, and the motor is burned.
It should be noted that the above background description is only for the convenience of clear and complete description of the technical solutions of the present application and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present application.
Disclosure of Invention
Based on the foregoing defects in the prior art, embodiments of the present invention provide a check valve, which has a conventional one-way flow limiting function, and also has a self-sand-discharging function, so as to avoid sand blockage.
In order to achieve the above object, the present application provides the following technical solutions.
A one-way valve comprising: the straight pipe is internally provided with a one-way flow limiting mechanism which can be conducted from top to bottom and is used for limiting the flow of fluid below the one-way flow limiting mechanism to flow upwards; the upper end of the bypass pipe is connected with the side wall of the straight pipe, the bypass pipe is communicated with the straight pipe, and the one-way flow limiting mechanism is positioned below the upper end of the bypass pipe; the axial direction of the bypass pipe is not completely coincided with the axial direction of the straight pipe.
Preferably, the bypass pipe includes a bent pipe section having an upper end connected to a side wall of the straight pipe, and a straight pipe section connected to a lower end of the bent pipe section.
Preferably, the curved shape of the pipe bending section is an arc shape with smooth transition.
Preferably, the straight pipe is a straight pipe, and the axial direction of the straight pipe section is coincident with the axial direction of the straight pipe.
Preferably, the one-way flow restriction mechanism includes: and the valve plate is pivotally connected to the inner wall of the straight pipe and can rotate downwards.
Preferably, the inner wall of the straight pipe is necked inwards to form a step, the valve plate is connected to the step through a connecting shaft, and the end part, far away from the connecting shaft, of the valve plate can be covered and sealed on the step.
Preferably, the upper end face of the valve plate is provided with a sealing ring seat, and the sealing ring seat can be seated on the edge of the step.
Preferably, the one-way flow restriction mechanism includes: the straight pipe comprises a plug and a ball seat, the plug and the ball seat are arranged in the straight pipe, a through hole is formed in the plug, the ball seat is located above the plug, and a valve ball is arranged between the plug and the ball seat.
Preferably, the one-way flow restriction mechanism further includes: a sleeve disposed in the straight tube, the ball seat and the valve ball being disposed in the sleeve.
An electric pump production string comprising: an oil pipe; according to the check valve of any one of the embodiments, the straight pipe of the check valve is connected with the oil pipe; a pump connected to the bypass line of the check valve; and the motor is connected with the pump to drive the pump to run.
According to the check valve provided by the embodiment of the invention, the straight pipe is internally provided with the one-way flow limiting mechanism, and the side wall of the straight pipe is connected with the bypass pipe of which the circumferential direction is not completely overlapped with the circumferential direction. When the electric pump oil production pipe using the one-way valve is normally produced, the one-way flow limiting mechanism is closed, and the bypass pipe can be upwards flowed by crude oil, so that oil production is realized.
The bypass pipe transforms the internal channel of the electric pump oil production pipe column from the original straight channel into a bent channel. Therefore, once the pump is stopped, fine sand and silt entering the electric pump oil production pipe column through the one-way valve fall to the lower part of the straight pipe along the vertical direction under the action of gravity, and are discharged through the one-way flow limiting mechanism, so that automatic sand discharge is realized, and sand burying is avoided.
Further areas of applicability will become apparent from the description provided herein. The description and specific examples of this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for assisting the understanding of the present application, and are not particularly limited to the shapes, the proportional sizes, and the like of the respective members in the present application. Those skilled in the art, having the benefit of the teachings of this application, may select various possible shapes and proportional sizes to implement the present application, depending on the particular situation. In the drawings:
FIG. 1 is a schematic diagram of a prior art check valve used in an electric pump production string;
FIG. 2A is a schematic structural view of a check valve according to a first preferred embodiment of the present invention;
fig. 2B is a schematic structural view of a check valve according to a second preferred embodiment of the invention.
Detailed Description
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," and similar expressions are for the purpose of illustration based on the drawings in the specification and are not meant to be the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the structure of a check valve applied to an electric pump oil production string in the prior art is schematically illustrated, the check valve includes a valve housing 5, a baffle 6 is disposed in the valve housing 5, an opening 601 is disposed on the baffle 6, a lower end of the valve housing 5 is connected to a lower joint 9, an upper end of the lower joint 9 abuts against a valve seat 8, and a space defined between the valve seat 8 and the baffle 6 accommodates a valve ball 7.
Since the passages in the valve housing 5 and the lower joint 9 are straight passages, the internal passages of the electric pump production string, when the one-way valve is applied in the electric pump production string, are straight from top to bottom. Once the pump is stopped, the valve ball 7 seats on the valve seat 8, the internal passage of the electric pump production string is completely closed, and the fine sand and silt entering the electric pump production string through the one-way valve will be buried and blocked because of the failure to flow back.
In view of this, the embodiment of the present invention provides a check valve, which has a conventional one-way flow limiting function, and also has a self-sand-discharging function to avoid the occurrence of blocking.
Specifically, as shown in fig. 2A and 2B, the check valve according to the embodiment of the present invention may include: the straight pipe 1 is provided with a one-way flow limiting mechanism 3, and the one-way flow limiting mechanism 3 can be conducted from top to bottom and is used for limiting the flow of fluid below the one-way flow limiting mechanism 3 to flow upwards; the upper end of the bypass pipe 2 is connected with the side wall of the straight pipe 1, the bypass pipe 2 is communicated with the straight pipe 1, and the one-way flow limiting mechanism 3 is positioned below the upper end of the bypass pipe 2; the axial direction of the bypass pipe 2 does not completely coincide with the axial direction of the straight pipe 1.
According to the check valve provided by the embodiment of the invention, the straight pipe 1 is provided with the one-way flow limiting mechanism 3, and the side wall of the straight pipe is connected with the bypass pipe 2, the circumferential direction of which is not completely overlapped with the circumferential direction of the straight pipe. When the electric pump oil production pipe column using the one-way valve is normally produced, the one-way flow limiting mechanism 3 is closed, and crude oil can flow the bypass pipe 2 upwards to realize oil production.
The bypass pipe 2 transforms the internal channel of the electric pump oil production pipe column from the original straight channel into a bent channel. Therefore, once the pump is stopped, fine sand and silt entering the electric pump oil production pipe column through the one-way valve fall to the lower part of the straight pipe 1 along the vertical direction under the action of gravity, and are discharged through the one-way flow limiting mechanism 3, so that automatic sand discharge is realized, and sand burying is avoided.
In this embodiment, the upper end outer wall of straight tube 1 is provided with the external screw thread to realize dismantling with oil pipe and be connected.
The upper end of the by-pass pipe 2 is connected to the side wall of the straight pipe 1, and the lower end thereof needs to be connected to a pump located below the check valve, so that there must be a pipe section whose axial direction does not coincide with the axial direction of the straight pipe 1. Therefore, the internal channel of the electric pump oil production pipe column is changed into a bent channel from the original straight channel by applying the electric pump oil production pipe column with the one-way valve.
One possible way of using the bypass pipe 2 is to include a bent pipe section 201 having an upper end connected to a side wall of the straight pipe 1, and a straight pipe section 202 connected to a lower end of the bent pipe section 201. Among them, the straight pipe section 202 and the bent pipe section 201 are preferably integrally formed. Also, the curved shape of the pipe bend 201 is preferably an arc shape with smooth transition to reduce the flow resistance of the liquid.
Since the lower end of the straight pipe section 202 is the lower end of the bypass pipe 2, which needs to be connected and bear the weight of the pump, the axial direction of the straight pipe section 202 is preferably coincident with the axial direction of the straight pipe 1, so as to reduce the circumferential torque caused by the non-centered axial direction of the check valve as much as possible, and the check valve has sufficient hanging weight strength.
Of course, the bypass pipe 2 may also comprise other possible ways, for example, the bypass pipe 2 may comprise a first straight pipe section (perpendicular to the straight pipe 1, or inclined downward) with an upper end connected to the side wall of the straight pipe 1, and a lower end connected to a second straight pipe section extending vertically downward.
In this embodiment, the one-way flow restriction 3 may allow fluid or sand to flow from top to bottom, i.e. allow fluid or sand to flow out of the straight pipe 1, but not allow crude oil to flow into the straight pipe 1.
That is, when the one-way valve is applied to the normal production of an electric pump oil production pipe column, the one-way flow limiting mechanism 3 closes the straight pipe 1, and when the pump is stopped, the one-way flow limiting mechanism 3 opens the straight pipe 1.
As shown in fig. 2A, in one embodiment, the one-way flow restriction mechanism 3 may include a valve plate 301 pivotally connected to an inner wall of the straight pipe 1, the valve plate 301 being rotatable downward.
Further, the inner wall of the straight pipe 1 may be necked inward to form a step 101, the valve plate 301 may be connected to the step 101 by a connecting shaft, and an end of the valve plate 301 remote from the connecting shaft may be capped on the step 101. Also, the upper end surface of the valve plate 301 may be provided with a sealing ring seat 302 made of a rubber material, and the sealing ring seat 302 can be seated on the edge of the step 101 to improve the sealing performance of the valve plate 301 against the straight pipe 1.
In another embodiment, as shown in fig. 2B, the one-way flow restriction mechanism 3 may include a plug 304 disposed in the straight pipe 1 and a ball seat 305, the plug 304 is provided with a through hole 304a, the ball seat 305 is disposed above the plug 304, and a valve ball 303 is disposed between the plug 304 and the ball seat 305. Further, a sleeve 306 is provided in the straight pipe 1, and the ball seat 305 and the valve ball 303 are both provided in the sleeve 306.
The plug 304 and the sleeve 306 can be detachably arranged in the straight pipe 1 in a threaded connection mode, and the lower end of the plug 304 can be used for propping up the upper end face of the plug 304. The valve ball 303 is also threadably received within the sleeve 306, with the valve ball 303 being defined between the plug 304 and the valve seat.
The embodiment of the invention also provides an electric pump oil production pipe column, which can comprise: an oil pipe; in the check valve according to any one of the above embodiments, the straight pipe 1 of the check valve is connected with an oil pipe; the pump is connected with the bypass pipe 2 of the one-way valve; and the motor is connected with the pump to drive the pump to run.
It should be noted that any suitable existing configuration may be used for the pump, motor, etc. in the electric pump production string of the embodiments of the present invention. For clearly and briefly explaining the technical solution provided by the present embodiment, the above parts will not be described again, and the drawings in the specification are also simplified accordingly. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended.
The above description is only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention based on the disclosure of the present invention without departing from the spirit and scope of the present invention.
Claims (10)
1. A check valve, comprising:
the straight pipe is internally provided with a one-way flow limiting mechanism which can be conducted from top to bottom and is used for limiting the flow of fluid below the one-way flow limiting mechanism to flow upwards;
the upper end of the bypass pipe is connected with the side wall of the straight pipe, the bypass pipe is communicated with the straight pipe, and the one-way flow limiting mechanism is positioned below the upper end of the bypass pipe; the axial direction of the bypass pipe is not completely superposed with the axial direction of the straight pipe;
when the electric pump oil production pipe column using the one-way valve is normally produced, the one-way flow limiting mechanism is closed, and crude oil can flow upwards through the bypass pipe; once the pump is stopped, fine sand and silt entering the electric pump oil production pipe column through the one-way valve fall to the lower part of the straight pipe along the vertical direction under the action of gravity, and then are discharged through the one-way flow limiting mechanism.
2. The check valve as in claim 1, wherein said bypass pipe comprises a bent pipe section having an upper end connected to a side wall of said straight pipe, and a straight pipe section connected to a lower end of said bent pipe section.
3. The check valve of claim 2, wherein the curved shape of the elbow section is a smoothly transitioning arc.
4. A check valve as claimed in claim 2, wherein the axial direction of the straight tube section coincides with the axial direction of the straight tube.
5. The one-way valve of claim 1, wherein the one-way flow restricting mechanism comprises: and the valve plate is pivotally connected to the inner wall of the straight pipe and can rotate downwards.
6. A check valve as claimed in claim 5, wherein the inner wall of said straight tube is necked-in to form a step, said valve plate being connected to said step by a connecting shaft, the end of said valve plate remote from said connecting shaft being capable of capping said step.
7. The check valve as in claim 6, wherein the upper end face of the valve plate is provided with a sealing ring seat capable of seating on the edge of the step.
8. The one-way valve of claim 1, wherein the one-way flow restricting mechanism comprises: the straight pipe comprises a plug and a ball seat, the plug and the ball seat are arranged in the straight pipe, a through hole is formed in the plug, the ball seat is located above the plug, and a valve ball is arranged between the plug and the ball seat.
9. The one-way valve of claim 8, wherein the one-way flow restricting mechanism further comprises: a sleeve disposed in the straight tube, the ball seat and the valve ball being disposed in the sleeve.
10. An electric pump production string, comprising:
an oil pipe;
a check valve as claimed in any one of claims 1 to 9, the straight tube of the check valve being connected to the tubing;
a pump connected to the bypass line of the check valve;
and the motor is connected with the pump to drive the pump to run.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810163262.8A CN108547592B (en) | 2018-02-26 | 2018-02-26 | One-way valve and electric pump oil production pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810163262.8A CN108547592B (en) | 2018-02-26 | 2018-02-26 | One-way valve and electric pump oil production pipe column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108547592A CN108547592A (en) | 2018-09-18 |
| CN108547592B true CN108547592B (en) | 2020-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810163262.8A Active CN108547592B (en) | 2018-02-26 | 2018-02-26 | One-way valve and electric pump oil production pipe column |
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| Country | Link |
|---|---|
| CN (1) | CN108547592B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2576962Y (en) * | 2002-04-04 | 2003-10-01 | 北京安东奥尔工程技术有限责任公司 | Desilting pipe |
| CN2804434Y (en) * | 2005-06-19 | 2006-08-09 | 熊兴菊 | Side input valve of oil pump |
| CN201116463Y (en) * | 2007-11-01 | 2008-09-17 | 吕向升 | Oil-well pump sand-proof oil drain valve |
| CN202833113U (en) * | 2012-10-16 | 2013-03-27 | 王远 | Sand prevention completion pipe string of electric submersible pump |
| CN204003391U (en) * | 2014-08-24 | 2014-12-10 | 山东寿光市坤隆石油机械股份有限公司 | Solid plunger sand-proof oil-well pump |
| CN205533136U (en) * | 2016-04-21 | 2016-08-31 | 山东寿光市坤隆石油机械股份有限公司 | Keep off sand formula oil -well pump |
| CN206458588U (en) * | 2017-01-13 | 2017-09-01 | 中国石油天然气股份有限公司 | Sand-catching apparatus on sucker rod pump pump |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9797220B2 (en) * | 2014-03-06 | 2017-10-24 | Weatherford Technology Holdings, Llc | Tieback cementing plug system |
-
2018
- 2018-02-26 CN CN201810163262.8A patent/CN108547592B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2576962Y (en) * | 2002-04-04 | 2003-10-01 | 北京安东奥尔工程技术有限责任公司 | Desilting pipe |
| CN2804434Y (en) * | 2005-06-19 | 2006-08-09 | 熊兴菊 | Side input valve of oil pump |
| CN201116463Y (en) * | 2007-11-01 | 2008-09-17 | 吕向升 | Oil-well pump sand-proof oil drain valve |
| CN202833113U (en) * | 2012-10-16 | 2013-03-27 | 王远 | Sand prevention completion pipe string of electric submersible pump |
| CN204003391U (en) * | 2014-08-24 | 2014-12-10 | 山东寿光市坤隆石油机械股份有限公司 | Solid plunger sand-proof oil-well pump |
| CN205533136U (en) * | 2016-04-21 | 2016-08-31 | 山东寿光市坤隆石油机械股份有限公司 | Keep off sand formula oil -well pump |
| CN206458588U (en) * | 2017-01-13 | 2017-09-01 | 中国石油天然气股份有限公司 | Sand-catching apparatus on sucker rod pump pump |
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| Publication number | Publication date |
|---|---|
| CN108547592A (en) | 2018-09-18 |
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